docs: def hello():
      """"http://click.pocoo.org/5/
      http://click.pocoo.org/5/api/
      """
      click.clear()
      click.secho('Hello World!', fg='green')
      click.secho('Some more text', bg='blue', fg='white')
      click.secho('ATTENTION', blink=True, bold=True)
  
      click.echo('Continue? [yn] ', nl=False)
      c = click.getchar()
      click.echo()
      if c == 'y':
          click.echo('We will go on')
      elif c == 'n':
          click.echo('Abort!')
      else:
          click.echo('Invalid input :(')
      click.echo_via_pager('\n'.join('Line %d' % idx
                                 for idx in range(200)))